HC Deb 21 April 1980 vol 983 c46W
Mr. Dudley Smith

asked the Minister of Transport what is the present mileage of urban motorways; and what is the mileage of motorways running through built-up areas.

Mr. Kenneth Clarke

There is no precise definition of the term "urban motorway". About 100 miles of trunk road motorway and 60 miles of principal road motorway pass through urban areas in England.